This is a truly delicious and such an elegant starter OR luncheon dish; the dressing can be prepared in advance, as can the bacon. Then, it's just a last minute assembly job whilst the scallops are being cooked - they only need about 2 minutes each side in a very hot pan. If you cannot get hold of fresh chervil, which has such a delicate flavour, don't bother using dried chervil, it tastes like grass!!! However, you can use some very finely chopped parsley OR a parsley and fennel mix instead. If you are watching your fat intake, substitute the streaky bacon for lean ham, but still crisp it up, as it is the crunchy texture that makes this dish so lovely.